docs: remove about plugins option (#1569)

source/docs/troubleshooting.md

@@ -218,20 +218,7 @@ Sometimes when running the command `$ hexo generate` it returns an error:
 FATAL Something's wrong. Maybe you can find the solution here: http://hexo.io/docs/troubleshooting.html
 Template render error: (unknown path)
 ```
-It means that there are some unrecognizable words in your file, e.g. invisible zero width characters. There are two possibilities One is your new page/post, and the other one is `_config.yml`.
-In `_config.yml`, don't forget add whitespace before a list in hash. There is the wiki page about [YAML](https://en.wikipedia.org/wiki/YAML).
-The error one:
-```
-plugins:
-- hexo-generator-feed
-- hexo-generator-sitemap
-```
-The correct one:
-```
-plugins:
-  - hexo-generator-feed
-  - hexo-generator-sitemap
-```
+One possible reason is that there are some unrecognizable words in your file, e.g. invisible zero width characters.
 
 [Warehouse]: https://github.com/hexojs/warehouse
 [Swig]: http://paularmstrong.github.io/swig/

source/pt-br/docs/troubleshooting.md

@@ -204,21 +204,7 @@ Este é [um problema no BashOnWindows conhecido](https://github.com/Microsoft/Ba
 FATAL Something's wrong. Maybe you can find the solution here: http://hexo.io/docs/troubleshooting.html
 Template render error: (unknown path)
 ```
-Isso significa que existem algumas palavras irreconhecíveis no seu arquivo. Existem duas possibilidades, uma é seu novo page/post, a outra é o `_config.yml`.
-Em `_config.yml`, não esqueça de adicionar espaços em branco antes de uma lista no hash. Existe uma página wiki sobre [YAML](https://en.wikipedia.org/wiki/YAML).
-
-Forma errada:
-```
-plugins:
-- hexo-generator-feed
-- hexo-generator-sitemap
-```
-Forma correta:
-```
-plugins:
-  - hexo-generator-feed
-  - hexo-generator-sitemap
-```
+One possible reason is that there are some unrecognizable words in your file, e.g. invisible zero width characters.
 
 [Warehouse]: https://github.com/hexojs/warehouse
 [Swig]: http://paularmstrong.github.io/swig/

source/th/docs/troubleshooting.md

@@ -247,22 +247,7 @@ $ hexo server -s
 FATAL Something's wrong. Maybe you can find the solution here: http://hexo.io/docs/troubleshooting.html
 Template render error: (unknown path)
 ```
-ถ้าเป็นอย่างนี้ หมายความว่ามีคำบางคำท่ีอ่านไม่ออกในไฟล์ เหตุผลท่ีก่อให้เกิดเรื่องนี้คือสองอย่าง อย่างแรกคือ page/post ใหม่ของคุณ อย่างท่ีสองคือ `_config.yml`  ในไฟล์ `_config.yml` อย่่าลืมเพิ่ม whitespace ก่อนไฟล์ท่ีเป็น hash ท่ีนี่มีเพจวิกิเกี่ยวกับ [YAML](https://en.wikipedia.org/wiki/YAML)
-
-
-
-ตัวท่ีผิดพลาด:
-```
-plugins:
-- hexo-generator-feed
-- hexo-generator-sitemap
-```
-ตัวท่ีถูกต้อง:
-```
-plugins:
-  - hexo-generator-feed
-  - hexo-generator-sitemap
-```
+One possible reason is that there are some unrecognizable words in your file, e.g. invisible zero width characters.
 
 [Warehouse]: https://github.com/hexojs/warehouse
 [Swig]: http://paularmstrong.github.io/swig/

source/zh-cn/docs/troubleshooting.md

@@ -210,25 +210,7 @@ FATAL Something's wrong. Maybe you can find the solution here: http://hexo.io/do
 Template render error: (unknown path)
 ```
 
-这表明你的文件中存在一些不可被识别的字符，比如不可见的零宽度字符。有可能你的新文章存在这个问题，或者你在修改配置文件时导致了这个错误。
-
-检查你的 `_config.yml` 文件中是否漏掉了列表前的空格。你可以查阅 Wikipedia 中 [YAML](https://zh.wikipedia.org/wiki/YAML) 相关页面来学习 YAML 语法。
-
-这个是错误的：
-
-```yaml
-plugins:
-- hexo-generator-feed
-- hexo-generator-sitemap
-```
-
-正确的应该是这样：
-
-```yaml
-plugins:
-  - hexo-generator-feed
-  - hexo-generator-sitemap
-```
+一种可能的原因是你的文件中存在一些不可被识别的字符，比如不可见的零宽度字符。
 
 [Warehouse]: https://github.com/hexojs/warehouse
 [Swig]: http://paularmstrong.github.io/swig/

source/zh-tw/docs/troubleshooting.md

@@ -162,21 +162,8 @@ Sometimes when running the command `$ hexo generate` it returns an error:
 FATAL Something's wrong. Maybe you can find the solution here: http://hexo.io/docs/troubleshooting.html
 Template render error: (unknown path)
 ```
-It means that there are some unrecognizable words in your file, e.g. invisible zero width characters. There are two possibilities One is your new page/post, and the other one is `_config.yml`.
-In `_config.yml`, don't forget add whitespace before a list in hash. There is the wiki page about [YAML](https://en.wikipedia.org/wiki/YAML).
-The error one:
-```
-plugins:
-- hexo-generator-feed
-- hexo-generator-sitemap
-```
-The correct one:
-```
-plugins:
-  - hexo-generator-feed
-  - hexo-generator-sitemap
-```
+One possible reason is that there are some unrecognizable words in your file, e.g. invisible zero width characters.
 
 [Warehouse]: https://github.com/hexojs/warehouse
 [Swig]: http://paularmstrong.github.io/swig/
-[Nunjucks]: http://mozilla.github.io/nunjucks/
+[Nunjucks]: http://mozilla.github.io/nunjucks/